drivers/misc/mediatek/gpu/mt8127/mali/mali/common/mali_spinlock_reentrant.c

   1 /*
   2  * This confidential and proprietary software may be used only as
   3  * authorised by a licensing agreement from ARM Limited
   4  * (C) COPYRIGHT 2013, 2015 ARM Limited
   5  * ALL RIGHTS RESERVED
   6  * The entire notice above must be reproduced on all authorised
   7  * copies and copies may only be made to the extent permitted
   8  * by a licensing agreement from ARM Limited.
   9  */
  10
  11 #include "mali_spinlock_reentrant.h"
  12
  13 #include "mali_osk.h"
  14 #include "mali_kernel_common.h"
  15
  16 struct mali_spinlock_reentrant *mali_spinlock_reentrant_init(_mali_osk_lock_order_t lock_order)
  17 {
  18         struct mali_spinlock_reentrant *spinlock;
  19
  20         spinlock = _mali_osk_calloc(1, sizeof(struct mali_spinlock_reentrant));
  21         if (NULL == spinlock) {
  22                 return NULL;
  23         }
  24
  25         spinlock->lock = _mali_osk_spinlock_irq_init(_MALI_OSK_LOCKFLAG_ORDERED, lock_order);
  26         if (NULL == spinlock->lock) {
  27                 mali_spinlock_reentrant_term(spinlock);
  28                 return NULL;
  29         }
  30
  31         return spinlock;
  32 }
  33
  34 void mali_spinlock_reentrant_term(struct mali_spinlock_reentrant *spinlock)
  35 {
  36         MALI_DEBUG_ASSERT_POINTER(spinlock);
  37         MALI_DEBUG_ASSERT(0 == spinlock->counter && 0 == spinlock->owner);
  38
  39         if (NULL != spinlock->lock) {
  40                 _mali_osk_spinlock_irq_term(spinlock->lock);
  41         }
  42
  43         _mali_osk_free(spinlock);
  44 }
  45
  46 void mali_spinlock_reentrant_wait(struct mali_spinlock_reentrant *spinlock, u32 tid)
  47 {
  48         MALI_DEBUG_ASSERT_POINTER(spinlock);
  49         MALI_DEBUG_ASSERT_POINTER(spinlock->lock);
  50         MALI_DEBUG_ASSERT(0 != tid);
  51
  52         MALI_DEBUG_PRINT(5, ("%s ^\n", __FUNCTION__));
  53
  54         if (tid != spinlock->owner) {
  55                 _mali_osk_spinlock_irq_lock(spinlock->lock);
  56                 MALI_DEBUG_ASSERT(0 == spinlock->owner && 0 == spinlock->counter);
  57                 spinlock->owner = tid;
  58         }
  59
  60         MALI_DEBUG_PRINT(5, ("%s v\n", __FUNCTION__));
  61
  62         ++spinlock->counter;
  63 }
  64
  65 void mali_spinlock_reentrant_signal(struct mali_spinlock_reentrant *spinlock, u32 tid)
  66 {
  67         MALI_DEBUG_ASSERT_POINTER(spinlock);
  68         MALI_DEBUG_ASSERT_POINTER(spinlock->lock);
  69         MALI_DEBUG_ASSERT(0 != tid && tid == spinlock->owner);
  70
  71         --spinlock->counter;
  72         if (0 == spinlock->counter) {
  73                 spinlock->owner = 0;
  74                 MALI_DEBUG_PRINT(5, ("%s release last\n", __FUNCTION__));
  75                 _mali_osk_spinlock_irq_unlock(spinlock->lock);
  76         }
  77 }